Kua noho te maitai kore waikura hei tetahi o ngā rauemi e whakamahia whānuitia ana puta noa i ngā ahumahi nā tōna ātete ki te waikura, tōna roa, me tōna whānui o ngā mahi. Heoi, kāore i te rite te hanga o ngā momo maitai kore waikura katoa. Ahakoa e whakamahia whānuitia ana ngā momo pēnei i te 304, 316L, me te 317L i roto i ngā tono ahumahi me ngā tono arumoni, kotahi te momo e tū ana i runga ake i ētahi atu mō te mahi:904L maitai kore waikura.
E mōhiotia ana mō te nui o te nikara me te molibdenum, he kowiri tira austenitic kounga teitei te 904L, ā, i hangaia hei tu atu ki ngā āhuatanga tino uaua. I roto i tēnei tuhinga, ka tūhuratia e mātou te take i kiia ai te 904L he pai ake i ētahi atu momo kowiri tira, me te arotahi ki tōna hanganga, ōna āhuatanga miihini, tōna ātete ki te waikura, me āna tono ahumahi.
Te Hanganga o te Kowiri tira 904L
Ko ngā āhuatanga tino pai o te 904L i ahu mai i tōna hanganga matū ahurei. Kei roto:
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Nikara (Ni):24 – 26%
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Konukōmiuma (Kr):19 – 23%
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Molibdenuma (Mo):4 – 5%
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Parahi (Cu):1 – 2%
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Waro (C):≤ 0.02%
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Rino (Fe):Taurite
Ki te whakatauritea ki ngā momo pēnei i te 316L (me te 10–14% nikara me te 2–3% molibdenum), he nui ake te ihirangi whakarewa o te 904L, ā, he nui ake tōna ātete ki ngā taiao waikura.
Ātete Pai Rawa ki te Waikura
1. Ātete ki te Waikura i puta mai i te Hauhā
He tino kaha te kaha o ngā taiao whai hauota pēnei i te wai moana, i ngā wai tote rānei ki ngā maitai kore waikura. Ahakoa ka taea e te 316L te ātete ki te whakaekenga o te hauota ki tētahi taumata, ka ngāwari ki te waikura poka me te kapiti. Ko te 904L, me ōna taumata nikara me te molibdenum teitei, ka whakarato i te parenga pai ake ki te waikura i puta mai i te hauota.
2. Ātete ki ngā Waikawa Kaha
He tino pai te ātete o te 904L ki ngā waikawa waikura kaha pērā i te waikawa whanariki me te waikawa phosphoric, arā, ngā taiao e kore ai e pai ngā momo pērā i te 304 me te 316L. Mā te tāpiri o te parahi ka whakarei ake i tōna ātete ki ngā waikawa whakaiti.
3. Ātete ki te Pakūnga Waikura
Ko te pakaru waikura ahotea he momo pakaru noa mō ngā maitai kore waikura i raro i te ahotea kume i roto i ngā taiao pūhaumāota. He tino kaha te ātete o te 904L ki te whakataurite ki ngā taumata whakarewa iti iho, ā, he pono hoki i roto i ngā tono nui.
Ngā Āhuatanga Hangarau o te 904L
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Kaha Kume:490 – 710 MPa
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Kaha Hua (0.2% te whakahekenga):220 MPa
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Te roa:35% te iti rawa
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Te pakeketanga:≤ 90 HRB
Ahakoa he rite te kaha ā-pūkaha o te 904L ki ētahi atu momo austenitic, ko tōna ātete ki te waikura me te pakari, ahakoa i ngā pāmahana iti, e wehewehe ana i a ia.
Te Āheinga Whakarewa me te Hanganga
Pērā i ētahi atu maitai kore waikura austenitic, he pai te kaha o te whakarewa o te 904L, ā, ka taea te hanga ki ngā momo āhua pēnei i ngā rau, ngā pereti, ngā paipa, me ngā hononga. Nā te iti o te waro ka ārai i te maturuturunga o te carbide i te wā whakarewa, ka mau tonu te ātete ki te waikura i te rohe e pāngia ana e te wera.
Te Whakataurite ki Ētahi Atu Tohu Kowiri tira
904L me 304
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E whakamahia whānuitia ana te 304 nā te mea he iti te utu me te ātete pai ki te waikura.
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Heoi, i roto i ngā taiao whai rawa i te kōhaita, i te waikawa rānei, ka tere te hinga o te 304, ko te 904L ia ka noho pumau.
904L me 316L
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He pai ake te ātete o te 316L ki te waikura i te 304 nā te mea he molybdenum kua tāpirihia.
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He nui atu te pai o te 904L i te 316L ki te ātete ki te pakaru o te rua, te waikura kapiti, me te pakaru o te waikura ahotea.
904L me 317L
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He nui ake te molybdenum o te 317L i te 316L, ā, he pai ake tōna ātete ki te waikura.
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Ko te 904L, me te nui ake o te nikara me te parahi, he pai tonu te mahi whakaiti i ngā waikawa me ngā taiao pūhaumāota kaha.
904L me ngā Rino Kowiri tira takirua
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He kaha teitei te whakarato o ngā maitai takirua pērā i te 2205, ā, he ātete pai hoki ki te waikura.
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Heoi, he pai ake te ātete o te 904L ki te waikawa whanariki, ā, he pai ake te matapae i ngā mahi i roto i ngā taiao matū kino.
Ngā Whakamahinga Ahumahi o te 904L
Nā tōna ātete kore e taea te whakataurite ki te waikura, ka whakamahia te 904L i roto i ētahi o ngā ahumahi tino uaua:
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Te Tukatuka Matū:Ngā tauhohenga, ngā whakawhiti wera, me ngā tāke e whakahaere ana i ngā waikawa whanariki me te waikawa phosphoric.
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Hinu me te Hau:Ngā papaaho takutai moana, ngā taputapu o raro moana, me ngā paipa e pāngia ana e te wai moana.
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Ahumahi Moana:Te hanga kaipuke, ngā whare tango tote, me ngā pūnaha whakamatao wai moana.
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Rongoā me te Tukatuka Kai:Ngā taputapu e hiahia ana ki te akuaku, me te ātete ki ngā matū horoi.
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Te penupenu me te pepa:Ngā mīhini keri me ngā taputapu whakama.
Ngā Painga o te Kowiri tira 904L
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He ātete tino pai ki te waikura o ngā poka me ngā kapiti.
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He roa te ora ratonga i roto i ngā taiao pukuriri.
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Ka mau tonu te ātete ki te waikura i muri i te whakarewanga nā te iti o te ihirangi waro.
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He tino pai te mahi i roto i ngā taiao whakahāora me te whakaiti.
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He rauemi pono mō ngā ahumahi kāore e taea te rahua.
Ngā Huakore o te Kowiri tira 904L
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Te utu teitei ake:Nā te nui o te nikara me te molibdenum i roto, he nui ake te utu o te 904L i te 304, te 316L rānei.
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Te wātea:Kāore i te tino whānui te penapena pērā i ngā momo paerewa.
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Te āheinga mīhini:He paku uaua ake te mīhini ki te whakataurite ki ngā maitai kore waikura iti te koranu.
Ahakoa ēnei ngoikoretanga, he maha ngā wā ka nui ake ngā painga o te mahi i ngā ngoikoretanga, inā koa i roto i ngā ahumahi nui.
He aha te take he kounga teitei te 904L
Ko te hiranga o te maitai kore waikura 904L nā tōna taurite ahurei o ngā āhuatanga:
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He nui te ihirangi nikara me te molibdenumwhakarato i te ātete ki ngā taiao uaua e kore ai e angitu ētahi atu momo.
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He iti te ihirangi waroārai i te waikura intergranular.
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Te pakari tino paika whakarite i te mahi pono i roto i ngā tono uaua.
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Ngā momo mahiā, ka taea te whakamahi puta noa i ngā ahumahi mai i ngā tipu matū ki te miihini moana.
Mō ngā ahumahi e hiahia ana ki te pono me te roa o te wā, ko te 904L te whiringa pai ake i ngā momo paerewa pēnei i te 304, 316L, tae atu ki te 317L.
Te Tūranga o ngā Kaiwhakarato Pono
Ahakoa he pai ake te mahi a te 904L, ka kitea anake ōna painga ina tangohia mai i ngā kaiwhakarato whaimana e tutuki ana i ngā paerewa o te ao. Ko ngā kamupene pēnei i asakysteelwhakarato i te maitai kore waikura 904L kounga teitei i roto i ngā momo āhua, kia mau tonu ai te pumau me te pono. Mā te whiriwhirisakysteel, ka whiwhi ngā ahumahi i te urunga atu ki ngā rauemi kua whakamatautauria, kua whaimanahia, ā, kua rite mō te whakamahi i roto i ngā tono tino uaua.
Whakamutunga
He pai ake te maitai kore waikura 904L i ētahi atu momo maitai kore waikura nā tōna ātete kore e taea te whakataurite ki te waikura, tōna kaha ki te tu atu ki ngā waikawa kaha, me tōna pakari i roto i ngā taiao pūhaumāota. Ahakoa he nui ake te utu, nā te roa o tōna ora mahi me te iti o te tiaki ka waiho hei whiringa utu-pai mō ngā ahumahi e hiahia ana ki te pono me te haumaru.
Mō ngā miihini, ngā kaihanga, me ngā kaihoko, mā te mārama ki te hiranga o te 904L ka taea te whiriwhiri i te rauemi tika mō ngā kaupapa nui. Nā tōna mahi kua whakamātauhia, he mea hanga hei kowiri tira kounga teitei e whakatakoto tonu ana i te paerewa i roto i ngā ahumahi tono nui puta noa i te ao.
Wā tuku: 20-Ākuhata-2025